WO2000001853A1 - Use of a fine-grained product produced during the production of titanium dioxide - Google Patents
Use of a fine-grained product produced during the production of titanium dioxide Download PDFInfo
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- WO2000001853A1 WO2000001853A1 PCT/EP1999/004525 EP9904525W WO0001853A1 WO 2000001853 A1 WO2000001853 A1 WO 2000001853A1 EP 9904525 W EP9904525 W EP 9904525W WO 0001853 A1 WO0001853 A1 WO 0001853A1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/04—Blast furnaces with special refractories
- C21B7/06—Linings for furnaces
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/04—Blast furnaces with special refractories
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the invention relates to the use of a
- titanium ores or "titanium slags" are chlorinated by in one Chlorination reactor of the titanium-containing raw material with gaseous chlorine with the addition of carbon-rich substance, in particular coke, for example in a circulating fluidized bed, is converted to titanium tetrachloride.
- a distillation process removes all accompanying substances from the liquid formed, so that a very pure starting product is available for the further process.
- the titanium tetrachloride is then converted to titanium dioxide with the addition of oxygen.
- Coke mixture which is the main ingredient
- the fine-grained product is removed from the process and deposited or disposed of in some other way.
- the solution to this problem is that the fine-grained product can be blown directly into a blast furnace to increase the durability of its refractory lining.
- a further solution to the problem according to the application consists in using the fine-grained product as an additive in a mixture with 5 to 80% by weight of residues containing iron and / or iron oxide to increase the durability of the refractory lining of a furnace for pyrometallurgical extraction or refining of metals or for Melt.
- This additive is expediently in the form of one or more of the binders containing Portland cement, blast furnace cement, alumina cement, electrostatic filter axis, bitumen and molasses, briquettes, pellets or granules.
- the aggregate can also be used in the form of sinter.
- the fine-grained product as an additive in a mixture with 20 to 80 wt .-% of one or more of the components selected from iron, iron oxide, alkaline earth metal oxides, alkaline earth metal hydroxides, A1 2 0 3 , A1 (0H) 3 , and residues of these components to increase the refractory lining of a furnace for pyrometalluric extraction or refining metals or used for melting.
- This additive is expediently also in the form of one or more briquettes, pelets or granules containing the binders Portland cement, blast furnace cement, alumina cement, electrostatic precipitator axis, bitumen and molasses.
- This aggregate can also be used in the form of sinter.
- Another solution to the problem is that a mixture consisting of fine-grained product and residues containing iron and / or iron compounds is prepared and thermally treated at temperatures of 200 to 1300 ° C.
- the titanium-containing reaction product produced in this way is in powder form with a grain size of ⁇ 5 mm, so that it can be easily blown into a melting furnace and contributes to increasing the durability of the furnace acidification.
- the fine-grained product can also be used.
- Ti0 2 production by the sulfate process 0 to 20 wt .-% coal, 0 to 20 wt .-% sulfur, 0 to 50 wt .-% ilmenite / Ti0 2 slag mixed and mixed finally treated in a fluidized bed furnace or rotary kiln at temperatures of 900 to 1,300 ° C and then used as an additive to improve the durability of the brick lining of a furnace for the melting metallurgical production of metallic materials.
- iron sulfate is also present as an iron compound in the residues, coal or carbon-containing residues are added to the mixture as part of the further embodiment of the invention, so that iron sulfate is reduced to iron oxide.
- a fine-grained product with a moisture content of 25% that is produced in the production of titanium dioxide by the chloride process is dried directly and then has a composition with the main components after protective screening via a 2 mm sieve:
- the grain size of the product is 100% ⁇ 2 mm. This product can be blown directly into the blast furnace. 2nd embodiment
- the mixture is thermally treated in a rotary kiln at a temperature of approx. 280 ° C.
- the powdery product discharged from the rotary kiln has a grain size of 100% ⁇ 2 mm after protective screening through a 2 mm sieve and contains 25% by weight of TiO 2 and 35% by weight of Fe 2 0 3 as main components. This mixture can be blown directly into a blast furnace.
- the mixture is placed in a furnace with a stationary fluidized bed and thermally treated at a temperature of approx. 1,000 ° C.
- the pulverulent product discharged from the fluidized bed furnace with a grain size of 100% ⁇ 5 mm contains as main components 29% by weight Ti0 2 24% by weight Fe 2 0 3 4% by weight Si0 2 .
- the addition of sulfur serves both as an energy source and for setting the required sulfur dioxide concentration in the exhaust gas.
- the sulfur dioxide formed during the thermal treatment of the mixture is withdrawn from the fluidized bed furnace and used to produce sulfuric acid.
- the product produced in this way can advantageously be fed to a metallurgical process.
- blast furnace cement containing 51% by weight of CaO, 27% by weight of SiO 2 , 4.5% by weight of A1 2 0 3 , 4.5% by weight of TiO 2 and 7 are added with stirring %
- alumina cement containing 40% by weight of CaO, 6.5% by weight of SiO 2 , 25% by weight of A1 2 0 3 was added to the mixer and the mixture was mixed intimately for 5 minutes. 50 parts by weight of this mixture, 50 parts by weight of water are mixed and the mixture is homogenized for 2 minutes.
- the homogeneous mixture is placed on a briquetting press with which cylindrical shaped bodies with an outer diameter of 80 mm and a length of 40 mm are pressed under a pressure of 120 bar.
- the molded articles produced After a setting time of 14 days, the molded articles produced have a breaking strength of 2,700 Newtons. After heating the moldings to 1,000 ° C in a 100% CO atmosphere for 1.5 hours, a breaking strength of 3,050 Newtons is achieved. To determine the breaking strength (point strength), the molded bodies are exposed to the force acting continuously in a test press until they break. The force exerted on the molded body when it is broken is a measure of its breaking strength.
- the moldings are particularly suitable for use in the blast furnace process.
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Abstract
Description
Verwendung eines bei der Herstellung von Titandioxid anfallenden feinkörnigen Produkts Use of a fine-grained product resulting from the production of titanium dioxide
BesehreibungDescription
Die Erfindung betrifft die Verwendung eines bei derThe invention relates to the use of a
Herstellung von Titandioxid nach dem Chloridverfahren, bei dem titanhaltiger Rohstoff mit gasförmigem Chlor und inProduction of titanium dioxide by the chloride process, in the titanium-containing raw material with gaseous chlorine and in
Anwesenheit von kohlenstoffreicher Substanz, vorzugsweisePresence of high carbon substance, preferably
Kohle und/oder Koks, in einem Chlorierungsreaktor, vorzugsweise mit Fließbett, zu Titantetrachlorid umgesetzt wird, anfallenden feinkörnigen Produkts mit einer KörnungCoal and / or coke, in a chlorination reactor, preferably with a fluidized bed, is converted to titanium tetrachloride, resulting fine-grained product with a grain size
100% <5mm, das im getrockneten Zustand aus den100% <5mm, which in the dried state from the
HauptbestandteilenMain ingredients
10 bis 80 Gew.--% Ti02 10 to 80 wt.% Ti0 2
20 bis 60 Gew.-% Kohle und ggf. 5 bis 20 Gew.-% Si02 zusammengesetzt ist.20 to 60 wt .-% coal and possibly 5 to 20 wt .-% Si0 2 is composed.
Beim Chloridverfahren werden Titanerze oder „Titanschlacken" chloriert, indem in einem Chlorierungsreaktor der titanhaltige Rohstoff mit gasförmigem Chlor unter Zusatz von kohlenstoffreicher Substanz, insbesondere von Koks, beispielsweise in einer zirkulierenden Wirbelschicht, zu Titantetrachlorid umgesetzt wird. Durch einen Destillationsprozeß wird die dabei gebildete Flüssigkeit von allen Begleitstoffen befreit, so daß ein sehr reines Ausgangsprodukt für den weiteren Prozeß zur Verfügung steht. In einem Brenner wird dann das Titantetrachlorid unter SauerstoffZuführung zu Titandioxid umgesetzt.In the chloride process, titanium ores or "titanium slags" are chlorinated by in one Chlorination reactor of the titanium-containing raw material with gaseous chlorine with the addition of carbon-rich substance, in particular coke, for example in a circulating fluidized bed, is converted to titanium tetrachloride. A distillation process removes all accompanying substances from the liquid formed, so that a very pure starting product is available for the further process. The titanium tetrachloride is then converted to titanium dioxide with the addition of oxygen.
Bei diesem Prozeß fällt im Entstaubungsfilter ein Teil des nicht umgesetzten titanhaltigen Rohstoff/Kohle- und/oderIn this process, part of the unconverted titanium-containing raw material / coal and / or falls in the dedusting filter
Koks-Gemisches an, das als HauptbestandteileCoke mixture, which is the main ingredient
10 bis 80 Gew.-% Ti02 10 to 80 wt .-% Ti0 2
20 bis 60 Gew.-% Kohle und ggf. 5 bis 20 Gew.-% Si02 mit einer Körnung von 100 % <5 mm enthält.Contains 20 to 60 wt .-% coal and optionally 5 to 20 wt .-% Si0 2 with a grain size of 100% <5 mm.
Da dieses feinkörnige Produkt die Durchführung der weiteren Behandlung des Titantetrachlorids behindern würde, wird das feinkörnige Produkt aus dem Verfahren entfernt und deponiert oder auf andere Weise entsorgt.Since this fine-grained product would hinder further treatment of the titanium tetrachloride, the fine-grained product is removed from the process and deposited or disposed of in some other way.
Im Hinblick darauf, daß die Bereitstellung von Deponieraum oder eine anderweitige Entsorgung mit relativ hohen Kosten verbunden sind und in dem Bestreben, Abfallstoffe einer wirtschaftlichen Verwertung zuzuführen, liegt der vorliegende Anmeldung die Aufgabe zugrunde, die Möglichkeit einer wirtschaftlichen Nutzung des vorstehend beschriebenen feinkörnigen Produkts aufzuzeigen.In view of the fact that the provision of landfill space or other disposal involves relatively high costs and in the endeavor to recycle waste materials for commercial use, the present application is based on the task, the possibility to demonstrate economic use of the fine-grained product described above.
Die Lösung dieser Aufgabe besteht darin, daß das feinkörnige Produkt unmittelbar in einen Hochofen zur Erhöhung der Haltbarkeit von dessen feuerfesten Ausmauerung einblasbar ist.The solution to this problem is that the fine-grained product can be blown directly into a blast furnace to increase the durability of its refractory lining.
Eine weitere Lösung der anmeldungsgemäßen Aufgabe besteht in der Verwendung des feinkörnigen Produkts als Zuschlagstoff im Gemisch mit 5 bis 80 Gew.-% eisen- und/oder eisenoxidhaltigen Rückständen zur Erhöhung der Haltbarkeit der feuerfesten Ausmauerung eines Ofens zur pyrometallurgischen Gewinnung oder Raffination von Metallen oder zum Schmelzen.A further solution to the problem according to the application consists in using the fine-grained product as an additive in a mixture with 5 to 80% by weight of residues containing iron and / or iron oxide to increase the durability of the refractory lining of a furnace for pyrometallurgical extraction or refining of metals or for Melt.
Zweckmäßigerweise liegt dieser Zuschlagstoff in Form von ein oder mehrere der Bindemittel Portlandzement, Hochofenzement, Tonerdezement, Elektrofilterachse, Bitumen und Melasse enthaltenden Briketts, Pellets oder Granulaten vor. Der Zuschlagstoff läßt sich auch in Form von Sinter einsetzen.This additive is expediently in the form of one or more of the binders containing Portland cement, blast furnace cement, alumina cement, electrostatic filter axis, bitumen and molasses, briquettes, pellets or granules. The aggregate can also be used in the form of sinter.
Eine weitere Lösung der Aufgabe besteht darin, daß das feinkörnige Produkt als Zuschlagstoff im Gemisch mit 20 bis 80 Gew.-% eines oder mehrerer der Bestandteile, ausgewählt aus Eisen, Eisenoxid, Erdalikalimetalloxiden, Erdalkalimetallhydroxiden, A1203, A1(0H)3, und Rückständen dieser Bestandteile zur Erhöhung der feuerfesten Ausmauerung eines Ofens zur pyrometallurischen Gewinnung oder Raffination von Metallen oder zum Schmelzen verwendet wird.Another solution to the problem is that the fine-grained product as an additive in a mixture with 20 to 80 wt .-% of one or more of the components selected from iron, iron oxide, alkaline earth metal oxides, alkaline earth metal hydroxides, A1 2 0 3 , A1 (0H) 3 , and residues of these components to increase the refractory lining of a furnace for pyrometalluric extraction or refining metals or used for melting.
Zweckmäßigerweise liegt auch dieser Zuschlagstoff in Form von ein oder mehrere der Bindemittel Portlandzement, Hochofenzement, Tonerdezement , Elektrofilterachse, Bitumen und Melasse enthaltenen Briketts, Peletts oder Granulat vor. Ebenso kann dieser Zuschlagstoff in Form von Sinter verwendet werden .This additive is expediently also in the form of one or more briquettes, pelets or granules containing the binders Portland cement, blast furnace cement, alumina cement, electrostatic precipitator axis, bitumen and molasses. This aggregate can also be used in the form of sinter.
Eine weitere Lösung der Aufgabe besteht darin, daß eine Mischung, bestehend aus feinkörnigem Produkt und aus Eisen und/oder Eisenverbindungen enthaltenden Rückständen, hergestellt und bei Temperaturen von 200 bis 1300 °C thermisch behandelt wird. Das auf diese Weise erzeugte titanhaltige Reaktionsprodukt liegt pulverförmig mit einer Körnung von < 5 mm vor, so daß es problemlos in einen Schmelzofen einblasbar ist und zur Erhöhung der Haltbarkeit der Ofenaus auerung beiträgt .Another solution to the problem is that a mixture consisting of fine-grained product and residues containing iron and / or iron compounds is prepared and thermally treated at temperatures of 200 to 1300 ° C. The titanium-containing reaction product produced in this way is in powder form with a grain size of <5 mm, so that it can be easily blown into a melting furnace and contributes to increasing the durability of the furnace acidification.
Das feinkörnige Produkt kann auch mitThe fine-grained product can also be used
20 bis 80 Gew.-% Eisen und/oder Eisenverbindungen und/oder Eisen enthaltenden Rückständen und/oder Eisenverbindungen enthaltenden20 to 80 wt .-% iron and / or iron compounds and / or iron-containing residues and / or iron compounds
Rückständen, 0 bis 60 Gew.-% Ti02 enthaltenden Rückständen aus derResidues, 0 to 60 wt .-% Ti0 2 containing residues from the
Ti02 Herstellung nach dem Sulfatverfahren 0 bis 20 Gew.-% Kohle, 0 bis 20 Gew.-% Schwefel, 0 bis 50 Gew.-% Ilmenit/Ti02-Schlacke gemischt und an- schließend in einem Wirbelschichtofen oder Drehrohrofen bei Temperaturen von 900 bis 1.300 °C behandelt und dann als Zuschlagstoff zur Verbesserung der Haltbarkeit der Ausmauerung eines Ofens für die schmelzmetallurigische Erzeugung metallischer Wrkstoffe benutzt werden.Ti0 2 production by the sulfate process 0 to 20 wt .-% coal, 0 to 20 wt .-% sulfur, 0 to 50 wt .-% ilmenite / Ti0 2 slag mixed and mixed finally treated in a fluidized bed furnace or rotary kiln at temperatures of 900 to 1,300 ° C and then used as an additive to improve the durability of the brick lining of a furnace for the melting metallurgical production of metallic materials.
Falls als Eisern/erbindung in den Rückständen auch Eisensulfat enthalten ist, werden im Rahmen der weiteren Ausgestaltung der Erfindung dem Gemisch noch Kohle bzw. kohlehaltige Rückstände zugesetzt, so daß Eisensulfat zu Eisenoxid reduziert wird.If iron sulfate is also present as an iron compound in the residues, coal or carbon-containing residues are added to the mixture as part of the further embodiment of the invention, so that iron sulfate is reduced to iron oxide.
Die Erfindung ist nachfolgend anhand mehrerer Ausführungsbeispiele näher erläutert.The invention is explained in more detail below with the aid of several exemplary embodiments.
1. Ausführungsbeispiel1st embodiment
Ein bei der Herstellung von Titandioxid nach dem Chloridverfahren anfallendes, feinkörniges Produkt mit einer Feuchte von 25% wird direkt getrocknet und besitzt dann nach der Schutzsiebung über ein 2 mm-Sieb eine Zusammensetzung mit den Hauptbestandteilen:A fine-grained product with a moisture content of 25% that is produced in the production of titanium dioxide by the chloride process is dried directly and then has a composition with the main components after protective screening via a 2 mm sieve:
42.7 Gew. -% Ti02 42.7% by weight of Ti0 2
44.8 Gew.-% Kohle 10 % Gew.-% Si02 44.8% by weight of coal 10% by weight of SiO 2
Die Korngröße des Produkts liegt zu 100 % bei < 2 mm. Dieses Produkt kann unmittelbar in den Hochofen eingeblasen werden. 2. AusführungsbeispielThe grain size of the product is 100% <2 mm. This product can be blown directly into the blast furnace. 2nd embodiment
In einer Mischanlage werden 50 Gew.-% eines bei der Herstellung von Ti02 nach dem Chloridverfahren anfallenden feinkörnigen Produkts mit einer Korngröße von 100 % < 5mm, einer Feuchte von 25 % und einer Zusammensetzung mit den Hauptbestandteilen 33 Gew.-% Koks 32 Gew. -% Ti02 7 Gew.-% Si02 mit 50 Gew.-% Eisenoxid aus der Schwefelsäureproduktion mit einem Feuchtigkeitsgehalt von 15 Gew.-%, einem Fe203-Gehalt von 69 Gew.-% und einem Ti02-Gehalt von 8 Gew.-% zu einer homogenen Mischung verarbeitet .50% by weight of a fine-grain product obtained in the production of TiO 2 by the chloride process with a grain size of 100% <5 mm, a moisture content of 25% and a composition with the main components 33% by weight coke 32% by weight % Ti0 2 7% by weight Si0 2 with 50% by weight iron oxide from sulfuric acid production with a moisture content of 15% by weight, an Fe 2 0 3 content of 69% by weight and a Ti0 2 Content of 8 wt .-% processed into a homogeneous mixture.
Ds Gemisch wird in einem Drehrohofen bei einer Temperatur von ca. 280 °C thermisch behandelt. Das aus dem Drehrohrofen ausgetragene pulverfömige Produkt besitzt nach einer Schutzsiebung über ein 2 mm Sieb eine Körnung von 100% < 2 mm und enthält als Hauptbestandteile 25 Gew.-% Ti02 und 35 Gew.-% Fe203. Dieses Gemisch kann unmittelbar in einen Hochofen eingeblasen werden.The mixture is thermally treated in a rotary kiln at a temperature of approx. 280 ° C. The powdery product discharged from the rotary kiln has a grain size of 100% <2 mm after protective screening through a 2 mm sieve and contains 25% by weight of TiO 2 and 35% by weight of Fe 2 0 3 as main components. This mixture can be blown directly into a blast furnace.
3. Ausführungsbeispiel3rd embodiment
In einer Mischanlage werden 20 Gew.-% eines bei der Herstellung von Ti02 nach dem Chloridverfahren anfallenden feinkörnigen Produkts mit einer Feuchte von 25 Gew.-% und einer analytischen Zusammensetzung, die derjenigen des 2.Ausführungsbeispiels entspricht, mit 50 Gew.-% Filtersalz (Eisensulfat) aus der Dünnsäurerückgewinnung mit einem Feuchtigkeitsgehalt von 4,2 Gew.-%, einem Fe2S04 -Gehalt von 38 Gew.-% und einem Ti02-Gehalt von 2,6 Gew.-% mit 4 Gew.-% Abbrand (Fe203) aus der Schwefelsäureproduktion mit einem Fe203-Gehalt von 69 Gew.-% und einem Ti02-Gehalt von 8 Gew.- % mit 4 Gew.-% Feinkohle und mit 20 Gew.-% Schwefel zu einem homogenen Gemisch verarbeitet. Das Gemisch wird einem Ofen mit stationärer Wirbelschicht aufgegeben und bei einer Temperatur von ca. 1.000 °C thermisch behandelt. Das aus dem Wirbelschichtofen ausgetragene pulverförmige Produkt mit einer Körnung von 100 % < 5 mm enthält als Hauptbestandteile 29 Gew.-% Ti02 24 Gew.-% Fe203 4 Gew.-% Si02. Der Zusatz von Schwefel dient sowohl als Energiequelle als auch zur Einstellung der erforderlichen Schwefeldioxidkonzentration im Abgas. Das bei der thermischen Behandlung des Gemisches entstandene Schwefeldioxid wird aus dem Wirbelschichtofen abgezogen und zur Herstellung von Schwefelsäure benutzt. Das auf diese Weise erzeugte Produkt kann in vorteilhafterweise einem metallurgischen Prozeß zugeführt werden.In a mixing plant, 20% by weight of a fine-grained product obtained in the production of TiO 2 by the chloride process with a moisture content of 25% by weight and an analytical composition which corresponds to that of the second exemplary embodiment is mixed with 50% by weight. Filter salt (iron sulfate) from the thin acid recovery with a Moisture content of 4.2% by weight, an Fe 2 S0 4 content of 38% by weight and a Ti0 2 content of 2.6% by weight with 4% by weight burnup (Fe 2 0 3 ) processed from the sulfuric acid production with an Fe 2 0 3 content of 69% by weight and a Ti0 2 content of 8% by weight with 4% by weight of fine coal and with 20% by weight of sulfur to form a homogeneous mixture. The mixture is placed in a furnace with a stationary fluidized bed and thermally treated at a temperature of approx. 1,000 ° C. The pulverulent product discharged from the fluidized bed furnace with a grain size of 100% <5 mm contains as main components 29% by weight Ti0 2 24% by weight Fe 2 0 3 4% by weight Si0 2 . The addition of sulfur serves both as an energy source and for setting the required sulfur dioxide concentration in the exhaust gas. The sulfur dioxide formed during the thermal treatment of the mixture is withdrawn from the fluidized bed furnace and used to produce sulfuric acid. The product produced in this way can advantageously be fed to a metallurgical process.
4. Ausführungsbeispiel4th embodiment
In einem Mischer werden 50 Gew.-% eines bei der Herstellung von Ti02 nach dem Chloridverfahren anfallenden feinkörnigen Produkts, dessen analytische Zusammensetzung derjenigen des 2. Ausführungsbeispiels entspricht und eine Feuchte von 25 Gew.-% aufweist, mit 12 Gew.-% CaO-haltigem Rückstand mit 95 Gew.-% CaO (berechnet auf die Trockensubstanz) und 18 Gew.-% MgO-haltigem Rückstand mit 89 Gew.-% MgO (berechnet auf Trockensubstanz) gegeben. Anschließend werden unter Rühren 13 Gew.-% Hochofenzement, enthaltend 51 Gew.-% CaO, 27 Gew.%- Si02, 4,5 Gew.-% A1203, 4,5 Gew.-% Ti02 sowie 7 Gew.-% Tonerdezement, enhaltend 40 Gew.-% CaO, 6,5 Gew.-% Si02, 25 Gew.-% A1203 dem Mischer zugeführt und das Gemisch 5 Minuten lang innig gemischt. 50 Gewichtsteile dieses Gemischs werden 50 Gewichtsteilen Wasser vermischt und das Gemisch 2 Minuten lang homogenisiert. Das homogene Gemisch wird auf eine Brikettierpresse gegeben mit der unter einem Druck von 120 bar zylinderförmige Formkörper mit einem Außendurchmesser von 80 mm und einer Länge von 40 mm gepreßt werden. Nach einer Abbindezeit von 14 Tagen besitzen die hergestellten Formkörper eine Bruchfestigkeit von 2.700 Newton. Nach dem Erhitzen der Formkörper auf 1.000 °C in 100 %-iger CO-Atmosphäre von 1,5 Stunden Dauer wird eine Bruchfestigkeit von 3.050 Newton erreicht. Zur Bestimmung der Bruchfestigkeit (Punktfestigkeit) werden die Formkörper in einer Prüfpresse einer kontinuierlich auf die einwirkende Kraft bis zum erfolgenden Bruch ausgesetzt. Die beim Brechen auf die Formkörper einwirkende Kraft gilt als Maß für deren Bruchfestigkeit. Die Formkörper sind insbesondere für den Einsatz im Hochofenprozeß geeignet.50% by weight of a fine-grained product obtained in the production of TiO 2 by the chloride process, the analytical composition of which corresponds to that of the second exemplary embodiment and has a moisture content of 25% by weight, with 12% by weight CaO -containing residue with 95% by weight of CaO (calculated on dry matter) and 18% by weight of MgO-containing residue with 89% by weight of MgO (calculated on dry matter). Subsequently, 13% by weight of blast furnace cement containing 51% by weight of CaO, 27% by weight of SiO 2 , 4.5% by weight of A1 2 0 3 , 4.5% by weight of TiO 2 and 7 are added with stirring % By weight of alumina cement containing 40% by weight of CaO, 6.5% by weight of SiO 2 , 25% by weight of A1 2 0 3 was added to the mixer and the mixture was mixed intimately for 5 minutes. 50 parts by weight of this mixture, 50 parts by weight of water are mixed and the mixture is homogenized for 2 minutes. The homogeneous mixture is placed on a briquetting press with which cylindrical shaped bodies with an outer diameter of 80 mm and a length of 40 mm are pressed under a pressure of 120 bar. After a setting time of 14 days, the molded articles produced have a breaking strength of 2,700 Newtons. After heating the moldings to 1,000 ° C in a 100% CO atmosphere for 1.5 hours, a breaking strength of 3,050 Newtons is achieved. To determine the breaking strength (point strength), the molded bodies are exposed to the force acting continuously in a test press until they break. The force exerted on the molded body when it is broken is a measure of its breaking strength. The moldings are particularly suitable for use in the blast furnace process.
Durch die erfindungsgemäße Verwendung des bei der Herstellung von Titandioxid nach dem Chloridverfahren anfallenden feinkörnigen Produkts im wesentlichen bestehend aus Ti02, kohlenstoffhaltiger Substanz und ggf. Si02 wird eine vollständige Verwertung des feinkörnigen Produkts in umweitschonender und wirtschaftlicher Weise erreicht. Through the use according to the invention of the fine-grained product obtained in the production of titanium dioxide by the chloride process essentially consisting of Ti0 2 , carbon-containing substance and optionally Si0 2 a complete recycling of the fine-grained product is achieved in an environmentally friendly and economical manner.
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU47801/99A AU4780199A (en) | 1998-07-06 | 1999-07-01 | Use of a fine-grained product produced during the production of titanium dioxide |
| DE59902589T DE59902589D1 (en) | 1998-07-06 | 1999-07-01 | USE OF A FINE-GRAINED PRODUCT RESULTING FROM THE PRODUCTION OF TITANIUM DIOXIDE |
| CA 2341162 CA2341162C (en) | 1998-07-06 | 1999-07-01 | Use of a fine-grained product produced during the production of titanium dioxide |
| EP99931224A EP1102867B1 (en) | 1998-07-06 | 1999-07-01 | Use of a fine-grained product produced during the production of titanium dioxide |
| US09/743,267 US6454831B1 (en) | 1998-07-06 | 1999-07-01 | Use of a fine-grained product produced during the production of titanium dioxide |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1998130102 DE19830102C1 (en) | 1998-07-06 | 1998-07-06 | Chloride process titanium dioxide production waste fines are used to increase refractory lining durability |
| DE19830102.2 | 1998-07-06 |
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| Publication Number | Publication Date |
|---|---|
| WO2000001853A1 true WO2000001853A1 (en) | 2000-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1999/004525 Ceased WO2000001853A1 (en) | 1998-07-06 | 1999-07-01 | Use of a fine-grained product produced during the production of titanium dioxide |
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| Country | Link |
|---|---|
| US (1) | US6454831B1 (en) |
| EP (1) | EP1102867B1 (en) |
| AU (1) | AU4780199A (en) |
| CA (1) | CA2341162C (en) |
| DE (2) | DE19830102C1 (en) |
| WO (1) | WO2000001853A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10336650A1 (en) * | 2003-08-09 | 2005-02-24 | Sachtleben Chemie Gmbh | Use of TiO2 residues from the sulphate process |
| WO2005116278A1 (en) * | 2004-05-24 | 2005-12-08 | Kerr-Mcgee Chemical Llc | Feedstock compositions for a fluidized bed chlorinator and methods for preparing same |
| US20060287672A1 (en) * | 2005-06-15 | 2006-12-21 | Western Clinical Engineering Ltd. | Tourniquet cuff with improved pneumatic passageway |
| AU2014201184B2 (en) * | 2006-08-02 | 2015-12-17 | Sachtleben Chemie Gmbh | Titanium-containing additive |
| DE102008056809A1 (en) | 2008-11-11 | 2010-05-27 | Kronos International, Inc. | Titanium-containing aggregate and process for its preparation from chloride-containing residues of titanium dioxide production |
| EP2415880A1 (en) * | 2010-08-03 | 2012-02-08 | Sachtleben Chemie GmbH | Additive containing coke and titanium and use of same to repair the cladding of metallurgical containers |
| CN105907968B (en) * | 2016-05-05 | 2017-12-12 | 朱鸿民 | A kind of method and filter plant that iron, titanium are extracted using ferrotianium grandidierite as raw material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4304724C1 (en) * | 1993-02-17 | 1994-05-05 | Metallgesellschaft Ag | Additive for strengthening oven refractory walls - comprises residues from titanium di:oxide prodn, coal residues, iron- and iron oxide-contg residues |
| DE4419816C1 (en) * | 1994-06-07 | 1995-06-29 | Metallgesellschaft Ag | Titanium-contg. additive used in refractory linings and as a slagging agent |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4442783A1 (en) * | 1994-12-01 | 1996-06-05 | Kronos Titan Gmbh | Process for increasing the yield in the chlorination of titanium-containing raw materials |
-
1998
- 1998-07-06 DE DE1998130102 patent/DE19830102C1/en not_active Expired - Fee Related
-
1999
- 1999-07-01 CA CA 2341162 patent/CA2341162C/en not_active Expired - Fee Related
- 1999-07-01 WO PCT/EP1999/004525 patent/WO2000001853A1/en not_active Ceased
- 1999-07-01 EP EP99931224A patent/EP1102867B1/en not_active Expired - Lifetime
- 1999-07-01 AU AU47801/99A patent/AU4780199A/en not_active Abandoned
- 1999-07-01 DE DE59902589T patent/DE59902589D1/en not_active Expired - Lifetime
- 1999-07-01 US US09/743,267 patent/US6454831B1/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4304724C1 (en) * | 1993-02-17 | 1994-05-05 | Metallgesellschaft Ag | Additive for strengthening oven refractory walls - comprises residues from titanium di:oxide prodn, coal residues, iron- and iron oxide-contg residues |
| DE4419816C1 (en) * | 1994-06-07 | 1995-06-29 | Metallgesellschaft Ag | Titanium-contg. additive used in refractory linings and as a slagging agent |
Non-Patent Citations (2)
| Title |
|---|
| "inorganic pigments, manufacturing processes", NOYES DATA CORPORATION, PARK RIDGE, NEW JERSEY,USA, XP002119539 * |
| "titania slag for improving blast furnace hearth lining life", STAHL UND EISEN, vol. 100, no. 17, 25 August 1980 (1980-08-25), pages 1037, XP002023684 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59902589D1 (en) | 2002-10-10 |
| CA2341162C (en) | 2009-05-26 |
| CA2341162A1 (en) | 2000-01-13 |
| AU4780199A (en) | 2000-01-24 |
| EP1102867B1 (en) | 2002-09-04 |
| DE19830102C1 (en) | 1999-07-29 |
| EP1102867A1 (en) | 2001-05-30 |
| US6454831B1 (en) | 2002-09-24 |
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